4TH APRIL.—We were now to proceed along the right bank of the Culgoa upwards to the United Balonne, and thence to continue ascending along the right bank of that river also, as far as the direction was favourable to our progress northward. This remained to be ascertained in exploring that river upwards. In gaining the right bank of the Culgoa, we had crossed the vast basin of clay extending from the Bogan on the south, to this river on the north, and westward to New Year's Range and Fort Bourke. That country was liable to be rendered quite impassable, had the rains set in. But even in such seasons we could still travel over the dry, firm ground bounding this basin of clay on the northward, as the left bank of the Bogan was also passable, however rainy the season, indeed more conveniently then than during a dry one. Rain, if it had fallen at this time, had greatly facilitated our exploration of the northern interior; but these rivers we had reached would supply us with water for some degrees to the northward, as I had been informed by the Commissioner of the district, and in our progress so far, I hoped we should arrive at a better watered country.
Taking a northerly course, we traversed fine grassy land, on which grew luxuriantly the ACACIA PENDULA and other shrubs, that reminded us of the banks of the Bogan, to which country we found here the exact counterpart, only that this was better watered. The course of the Culgoa was more easterly than I had calculated on, for, after going six miles northward, I had to travel at least as many eastward before I again found the river. We encamped on the acute north-western angle of an anabranch biting into the firm soil, and it was evident that we had reached the Balonne Major, or that part above the separation of the Culgoa from the Minor Balonne, both of which we had already crossed, and which ran thus, as from our camp the lines of trees along each of the minor channels were distinctly visible.
Separation of the Balonne into the Culgoa, Narran, etc.
The character of these rivers had been described to me by Commissioner Mitchell, the discoverer thereof. It was late before the drays came in, and Mr. Kennedy was led into the camp quite blind, having been suddenly attacked with purulent ophthalmia, when engaged in the survey of our route, about four miles from the camp. The heat had somewhat abated, but still this complaint, which we had attributed to it, had lately affected many of the party suddenly, as in the case of Mr. Kennedy. Latitude, 28° 27' 11" S. Thermometer at sunrise, 33°; at noon, 83°; at 4 p.m., 88°; at 9, 53°; with wet bulb, 47°.
5TH APRIL.—The party halted, and I took a ride to explore the course of the river, proceeding first northward. In that direction I came upon an angle of the Balonne, at about three miles from the camp. Beyond, after passing through much ACACIA PENDULA, I crossed a small plain, bounded by a Casuarina scrub. Partly to ascertain its extent and character, and partly in the hope of falling in with the river beyond, I entered it. I found this scrub full of holes, that obliged me to pursue a very tortuous course, impeded as I was too by the rugged stems and branches. I got through it, only after contending with these impediments for three miles. The country beyond it looked not at all like that back from the river, and I turned to the N.E., pursuing that course some miles; then eastward two miles, and next two miles to the S.E., still without finding any river; but, on the contrary, scrub in every direction. The sun was declining, and I turned at last to the S.W., and in that direction reached an extensive open forest, beyond which I saw at length the river line of trees. I continued to ride S.S.W., and finally south, until I saw our cattle grazing, and the tents, without having regained first, as I wished, my outward track. On the bank of the Balonne we found an apparently new species of ANDROPOGON with loose thin panicles of purplish flowers, and in the scrub I passed through, in my ride, I found a CASUARINA, indeterminable in the absence of flowers or fruit. It produces a gall as large as a hazel nut. Thermometer at sunrise, 37°; at noon, 90°; at 4 p.m., 94°; at 9, 57°; —with wet bulb, 53°.
6TH APRIL.—Mr. Kennedy's eyes being still very bad, I could not proceed, as the survey of our route was very important, in order to keep our account of longitude correctly. The necks of the cattle were much galled, and I therefore the more willingly halted another day. It was not without some impatience, however, that I did so, as we were approaching a point whence I could set out with horses to the north-west, and leave the cattle to refresh in a depôt on this fine river, which afforded an excellent base for our exploratory operations, in the wholly unknown regions immediately beyond it. This line of exploration I had anxiously wished to pursue in 1831, when obliged to return from the Karaula or Upper Barwan; and whatever had since been ascertained about that part of the interior, confirmed me the more in my first opinion as to the eligibility of that direction. It had occurred to me, on crossing the Culgoa, that by marking deeply on a tree, at each camp, a number of reference, our survey might be more practically useful and available to the colonists, as connecting so many particular localities therewith. I therefore marked that No. I. in Roman numerals; this II., and I shall add in this journal, at the end of the narrative of each day's proceedings, whatever number or mark may be made to distinguish the place of encampment described.
In the scrub near this, we observed an Acacia, apparently new, a broadleaved, white-looking wattle. There was also a branching Composite, which Sir W. Hooker has determined to be a very distinct and undoubted species of FLAVERIA of which all the other species are natives of the New World.[*] The CAPPARIS LASIANTHA was also found here growing on EXOCARPUS APHYLLA of Brown; it was found by Allan Cunningham and Frazer on Liverpool Plains, also, at Swan River. Thermometer, at sunrise, 44°; at noon, 95°; at 4 p.m., 96°; at 9, 63°;—with wet bulb, 57°. Height above the sea, 497 feet.
[* FLAVERIA AUSTRALASICA (Hook. MSS.) foliis lineari-lanceolatis integerrimis basi dilatatis, capitulis densissime globoso-fasciculatis, fasciculis subinvolucratis, bracteis exterioribus praecipue fasciculos superantibus omnibus late amplexantibus.]